ACID-BASE PROJECT

citric acid (H3C6H5O7)

• Citric acid is a weak organic acid with the formula C6H8O7. In biochemistry, the conjugate base of citric acid, citrate, is important as an intermediate in the citric acid cycle.It consists of 3 carboxyl (R-COOH) groups.

lactic acid (C3H6O3)

• Lactic acid is a carboxylic acid with the chemical formula C2H4OHCOOH. It has a hydroxyl group adjacent to the carboxyl group, making it an alpha hydroxy acid (AHA).

Ammonia: NH3

• The ammonia molecule has a trigonal pyramidal shape with an experimentally determined bond angle of 106.7° of NH3.

Zinc hydroxide: Zn(OH)2

• Zinc hydroxide Zn(OH)2 is an inorganic chemical compound. It occurs naturally as 3 rare minerals: wualfingite, ashoverite and sweetite

citric acid (H3C6H5O7) PROPERTIES

• Appearance is crystalline white solid
• Odorless
• Solubility of 547.79 g/100 mL (100 °C)
• It can exist either in an anhydrous form or as a monohydrate.
• When heated above 175 °C it decomposes through the loss of carbon dioxide and water.
• Molecular Weight of 192.12352

lactic acid (C3H6O3) PROPERTIES

• Mild acid taste
• Normally found as clear liquid
• density of 1.209 g/mL at 25 °C
• pH of 3.5
• Very miscible
• Carboxylic acid

AMMONIA (NH3) PROPERTIES

• Colorless gas
• Strong odor
• Density of 0.86 kg/m3
• Combusts when in contact with pure oxygen
• Highly stable
• Donates lone pair electron

ZINC HYDROXIDE: ZN(OH)2 PROPERTIES

• White solid
• Density of 3.053 g/cm3
• Melting point of 125 degrees Celsius
• Insoluble in alcohol
• Enthalpy of -642 kJ.mol-1.
• pH of 8.5

citric acid (H3C6H5O7) USES

• It is a natural preservative which occurs naturally in citrus fruits and is also used to add an acidic or sour taste to foods and drinks.

lactic acid (C3H6O3) USES

• Lactic acid is found primarily in sour milk. It is used in beer brewing to lower the wort pH in order to reduce some undesirable substances.

Zinc hydroxide: Zn(OH)2 USES

• Zinc hydroxide is used as an absorbent in surgical dressings.

citric acid (H3C6H5O7) HAZARDS

• Citric acid is a minor skin irritant, severe eye irritant,and consumption can lead to lose of tooth enamel.

lactic acid (C3H6O3) HAZARDS

• Do not let lactic acid come in contact with skin or eyes, be ingested or inhaled. If it comes in contact with skin or eyes, flush contaminated area with cold water for 15 minutes. If ingested, flush body with lots of water. If inhaled immediately expose victim to fresh air.

Ammonia: NH3 HAZARDS

• Do not let ammonia come in contact with your eyes and skin, and do not inhale. Doing so can cause immediate death and corrosion.

Zinc hydroxide: Zn(OH)2 HAZARDS

• Zinc hydroxide is generally non-flammable and poses no hazards. However, the compound should not be tasted or swallowed as it may be toxic, depending on personal sensitivity.

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